Extraction of aluminium from oxide $(A l_{2} O_{3})$ is best done by:

Reduction of

A l_{2} O_{3}

with

C O

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Electrolytic reduction of

A l_{2} O_{3}

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Reduction of

A l_{2} O_{3}

with sodium

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Reduction of

A l_{2} O_{3}

with carbon

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Solution

The correct option is B Electrolytic reduction of $A l_{2} O_{3}$
The melting point of $A l_{2} O_{3}$ is about $2000^{\circ} C$ , at which Aluminium is obtained in vapour state, which is very highly reactive. So, best method is electrolytic reduction of $A l_{2} O_{3}$ , by mixing with $N a_{3} A l F_{6} & C a F_{2}$ which lowers the melting point of the mix and brings conductivity.

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